#include <libavformat/avformat.h>

int main(int argc, char const *argv[])
{
    time_t now;
    time(&now);

    char *file_name;
    snprintf(file_name, 64, "/home/wzp/h264/video_%lu.h264", now);

    printf("string is %s\n", file_name);

    return 0;
}
